Galaxy S21 Ultra has finally received One UI 6 update in some of the countries. I thought it could take some time to release, but Samsung took no time to release it. It is available to install in the European region with the firmware number G998BXXU9FWK2 & 2.5GB of file size.
It comes with November security patch, which also a good think. Galaxy S21 & Galaxy S21+ smartphones also have received the Android 14 version.